are below 39.5. 5.4 PRACTICE PROBLEMS 1. Total cholesterol in children aged 10-15 years is as- sumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.4. a. What proportion of children 10-15 years of age have total cholesterol between 180 and 190? b. What proportion of children 10-15 years of age would be classified as hyperlipidemia (Assume that hyperlipidemia is defined as a total choles- terol level over 200)? c. What is the 90th percentile of cholesterol levels? 2. Among coffee drinkers, men drink a mean of 3.2 cups per day, with a standard deviation of 0.8 cups. Assume arning, LLC, an Ascend Learning Company